Author: Aparup Banerjee
MDL-30929 fixed spelling mistake in string.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=12fd545a01ad6af59a311bc670f4e79964bcac81
http://github.com/moodle/moodle/commit/12fd545a01ad6af59a311bc670f4e79964bcac81
+ 2.3 en [upgradestalefiles,core_admin]